问systemd-timesyncd服务处于空闲状态，不同步时间。

EN

      Local time: Wed 2019-01-16 21:32:01 CET
  Universal time: Wed 2019-01-16 20:32:01 UTC
        RTC time: Wed 2019-01-16 20:32:01
       Time zone: Europe/Vienna (CET, +0100)
 Network time on: yes
NTP synchronized: no
 RTC in local TZ: no

● systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor pr
  Drop-In: /lib/systemd/system/systemd-timesyncd.service.d
           └─disable-with-time-daemon.conf
   Active: active (running) since Wed 2019-01-16 21:36:08 CET; 11s ago
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 2316 (systemd-timesyn)
   Status: "Idle."
   CGroup: /system.slice/systemd-timesyncd.service
           └─2316 /lib/systemd/systemd-timesyncd

Jan 16 21:36:08 coretv systemd[1]: Starting Network Time Synchronization...
Jan 16 21:36:08 coretv systemd[1]: Started Network Time Synchronization.

#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See timesyncd.conf(5) for details.

[Time]
NTP=192.168.20.1
#FallbackNTP=ntp.ubuntu.com